---
title: "pH: research glossary | Sable Peptides"
description: "pH is a logarithmic measure of hydrogen ion activity in a solution, defined as the negative base-10 logarithm of that activity. Values below 7 are acidic a"
canonical: https://www.sablepeptides.co.uk/glossary/ph
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# pH

pH is a logarithmic measure of hydrogen ion activity in a solution, defined as the negative base-10 logarithm of that activity. Values below 7 are acidic and above 7 are basic at 25 °C. Solution pH strongly affects peptide charge, solubility, aggregation and the rates of degradation reactions such as deamidation.

Source: [en.wikipedia.org](https://en.wikipedia.org/wiki/PH)

## Related terms

-   [Peptide](/glossary/peptide)
-   [Deamidation](/glossary/deamidation)
-   [Solubility](/glossary/solubility)

[Back to glossary A–Z](/glossary/terms)

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